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Magnesium compound, solid catalyst component, catalyst for ethylene polymerization and method of producing ethylene polymer

a technology of ethylene polymerization and magnesium compound, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, chemical/physical process, etc., can solve the problems of letting the polymerization reactor be unstable, the flowability decreases, and the trouble of blocking the powder transport lin

Active Publication Date: 2010-07-13
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a new catalyst for ethylene polymerization that has excellent performance in producing high-quality polymers with good film appearance. The catalyst includes a magnesium compound made by reacting metal magnesium, ethanol, and a halogen-containing compound, as well as a solid catalyst component made by reacting the magnesium compound with a titanium compound and a halogen compound. The resulting catalyst has a high activity and good hydrogen sensitivity. The invention also provides a method for producing ethylene polymers using the new catalyst.

Problems solved by technology

The increase causes the trouble of blocking a powder transport line.
Further the powder flowability decreases due to the bad powder form, thereby letting a reactor of polymerization unstable.

Method used

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  • Magnesium compound, solid catalyst component, catalyst for ethylene polymerization and method of producing ethylene polymer
  • Magnesium compound, solid catalyst component, catalyst for ethylene polymerization and method of producing ethylene polymer
  • Magnesium compound, solid catalyst component, catalyst for ethylene polymerization and method of producing ethylene polymer

Examples

Experimental program
Comparison scheme
Effect test

example 1

(1) Preparation of Magnesium Compound

[0086]A reactor with max blend wing having an internal volume of 1 liter was flushed with nitrogen, and 608 ml (10.4 mole) of dehydrated ethanol, 67.7 ml (0.74 mole) of n-butanol, 0.18 g (1.4 milligram atom) of iodine and 36.0 g (1.48 milligram atom) of metal magnesium were poured into the reactor with “MAXBLEND®” blade wing and allowed to react at a reflux temperature (30° C.) with stirring (1,000 rpm) until no more hydrogen was generated from the system, to give a magnesium compound.

(2) Preparation of Solid Catalyst Component

[0087]A three-necked flask having an internal volume of 0.5 liter and equipped with a stirrer was flushed with nitrogen, and 15 g (131 mmole) of the magnesium compound obtained in the above (1) and 350 ml of hexane were placed in the three-necked flask. 4.9 mL (43 mmole) of silicon tetrachloride and 4.9 mL (64 mmole) of isopropanol were added to the mixture with stirring and reacted at 70° C. for 2 hours. Then 36 mL (0.33 m...

example 2

(1) Preparation of Magnesium Compound

[0091]Example 1 (1) was repeated except that 0.068 g (1.4 milligram atom) of anhydrous magnesium chloride was used instead of iodine.

(2) Preparation of Solid Catalyst Component

[0092]Example 1 (2) was repeated except that the magnesium compound prepared in the above (1) was used.

(3) Polymerization of Ethylene

[0093]Example 1 (3) was repeated except that the solid catalyst component prepared in the above (2) was used. Table 1 shows the results.

example 3

(1) Preparation of Magnesium Compound

[0094]Example 1 (1) was repeated except that the reaction temperature was set at 50° C.

(2) Preparation of Solid Catalyst Component

[0095]Example 1 (2) was repeated except that the magnesium compound prepared in the above (1) was used.

(3) Polymerization of Ethylene

[0096]Example 1 (3) was repeated except that the solid catalyst component prepared in the above (2) was used. Table 1 shows the results.

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Abstract

A magnesium compound obtainable by reacting metal magnesium, ethanol, an alcohol having from 3 to 10 carbon atoms and a halogen and / or a halogen-containing compound containing at least 0.0001 gram atom of a halogen atom relative to one gram atom of the metal magnesium at 0 to 70° C., which comprises composition represented by the formula (I), and which has a particle diameter D50 corresponding to 50% of cumulative weight fraction of from 4 to 20 μm and a particle size distribution index (P) of P<4.0:Mg(OC2H5)2−n(OR1)n  (I)where n is a numerical value satisfying 0<n<0.35, R1 is CmH2m+1, and m is an integer of from 3 to 10.

Description

TECHNICAL FIELD[0001]The invention relates to a magnesium compound, solid catalyst component and catalyst for ethylene based polymerization (referred to as “ethylene polymerization”), useful for ethylene homopolymerization and copolymerization of ethylene and an α-olefin, and a method of producing the homopolymers and copolymers thereof.TECHNICAL BACKGROUND[0002]Hitherto, ethylene homopolymers or copolymers of ethylene and α-olefins have been widely industrially produced with a Ziegler Natta catalyst containing a Ti compound and magnesium compound.[0003]Magnesium chloride and magnesium dialkoxide were used as a support of the catalyst system. In view of process constraints (e.g., powder fluidized drying efficiency) or improvements in catalyst activity and film appearance (e.g., reducing foreign bodies, so-called fish eyes or gel in film) (JP-A-H9-194522), the technique has been widely carried out that the support is mechanically pulverized for use. However the pulverization of suppo...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): B01J31/00C08F110/02B01J37/00
CPCC08F10/00C08F4/6548C08F110/02C08F2500/24C08F4/654C08F4/658C08F10/02
Inventor TANASE, SHOJIRONODA, HIDEAKIKATAYAMA, KIYOKAZUKONAKAZAWA, TAKEHITO
Owner IDEMITSU KOSAN CO LTD
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